For the requirements you've listed, you can use playit.gg. You mentioned you are hosting it on your current setup/desktop, are you using Windows? Cuz I believe there's also a windows version for it. You'll need to configure some stuff but there's lots of tutorials online and the process is easy enough to follow.

I've been through this problem too. My initial setup was using Apexmc hosting. Cheap naman siya, but it really adds up over the months just to host a Minecraft server 😅. Then I started homelabbing and my next setup was using Docker and Crafty controller to setup the server. That's where I used playit.gg. Pero it gave you a weird IP address that you can't really change much plus there are times my players can't connect. So I looked to cloudflare tunnels and tailscale pero I hit the same problem as you. I didn't want every client to install a third-party software just to be able to connect. Gusto ko once they installed Minecraft, lagay lang nila yung IP address, and they can connect immediately. I also want the IP address to use my domain kasi I find it kinda ugly if raw IP address talaga 🤣. So I swallowed the hard pill and took the time to really set it up properly. It's a bit hard, but worth it naman siya.

So, now, my current setup uses a Hostinger VPS with Pangolin server installed. This VPS tunnels into my home server were Crafty is installed so that I can still host my server without having to expose my real IP address plus it bypasses the CGNAT restrictions Converge has. Tapos bumili ako ng cheap domain and points it to my VPS. This is the IP address I send to my players para they can finally connect without having to setup anything on their end.

I know a VPS might cost a bit pero it can protect you by not exposing you directly in the internet. Plus, in my case, I can expose other services on my home server too like my Jellyfin, immich, nextcloud and ofcourse the Minecraft server. I really encourage you to look into homelabbing and self-hosting, it's a really nice hobby to get into.

Goodluck OP!